Merge branch 'meganetworkinterface' into MCOnwards

Conflicts:
	Tendu/src/it/chalmers/tendu/Tendu.java
	Tendu/src/it/chalmers/tendu/screens/GameScreen.java
Rid of onServiceReadyListener in bluetoothandler since it was
unnecessary
Moved BluetoothGameService to unused
Tag switching in Bluetoothandler message handling refactored
Cleaned some old code in BluetoothHandler and ConnectionService
BluetoothH fires event when a player has connected
Network fires event when player is disconnected